Key and combination cylinder lock



April! 4, 1967 R. G. PETERSEN 3,3112,@@

KEY AND COMBINATION CYLINDER LOCK Filed June 16, 1965 2 Sheets-Sheet 1 FIG.

ENVENTOW fim Mm m ATTORNEY April 4, 1967 R. G. PETERSEN KEY AND COMBINATION CYLINDER LOCK 2 Sheets-Sheet 2 Filed June 16, 1965 ATTORNEY United States Patent ()filice 3,312,09 Patented Apr. 4, 1967 3,312,090 KEY AND COMBINATION CYLINDER LOQK Rolland G. Petersen, 13393 Terry, Detroit, Mich. 48227 Filed June 16, 1965, Ser. No. 464,340 4 Claims. (Cl. 70285) This invention relates to locks generally, and more particularly to a cylinder lock that may be operated either by a key or combination.

for containment in lock casings of conventional size and shape.

Because of the installation problems which these oversize units would tend to create, such locks would doubtless prove undesirable and unacceptable for widespread use. Fully aware of these shortcomings inherent in combination type locks, the applicant has, as the primary object of this invention, the provision of a lock cylinder which may be operated either by combination or key, and is adapted for use in both rim and mortise type locks.

Another object of the invention is to provide a lock of the type previously described which may be contained in standard size cylinders so as to be interchangeable with conventional units presently in use on existing installations.

A further object of the invention is to provide a lock of the type previously described which is simplified in construction and extremely easy to operate.

Still another object of the invention is to provide a lock of the type previously described which is exceptional- 1y strong, and requires no periodic adjustments or regular service to insure proper operation.

Other features and advantages of the invention will become apparent after thorough consideration of a detailed descriptionof the same composed with reference I to the drawings, constituting a part of this application,

and in which:

FIGURE 1 is a side elevation view of a lock cylinder embodying the applicants invention, and showing the op erator handle 25.

\ 4-4 in FIGURE l showing the rectangular end 60 on the operator 56 engaged in the actuator cam 61.

FIGURE 5 is a section view taken substantially on plane 5-5 in FIGURE 3 showing the spaced wafers 32 in the operator handle 25 FIGURE 6 is a section view taken substantially on plane 66 in FIGURE 3 showing the transverse drive pin securing the tie rod 76 in the plug 30.

' FIGURE 7 is a section view taken substantially on 1 plane 7 7 in FIGURE 3 showing the spaced indentations 27 around the tubular end 23 on the operator han I dle 25.

FIGURE 8 is a section view taken substantially on plane 88 in FIGURE 3 showing the longitudinal projections 29 aligned with the slots 50 in the connector 42. FIGURE 9 is a section view taken substantially on plane 9-9 in FIGURE 3 showing the internal spline 28 on the sleeve 24 in engagement with the spaced fingers .86 on the drive wheel 84.

FIGURE 10 is a section View taken substantially on plane 1ll-1ll in FIGURE 3 showing the locking dog 68 in the slot 66 of the operator 56.

FIGURE 11 is a perspective view of the locking dog 68 removed from the lock assembly, so as to show struc tural details FIGURE 12 is a perspective view of the drive wheel 84 removed from the hub 59 of the operator 56 so as to show structural details.

FIGURE 13 is a perspective view of a circular tumbler 88 removed from the hub 59 of the operator 56 so as to show structural details.

FIGURE 14 is a perspective view of the operator 56 removed from the lock assembly so as to show structural details.

For a detailed description of the invention, reference is made to the drawings in which numeral 10 designates a round lock cylinder, externally threaded on the rear portion for engagement in the body of a lock not here shown. The cylinder 10 has a circular opening there through reduced in diameter at the back 12, and having in the rear portion thereof an annular shoulder 14 dividing the interior into two cylindrical chambers 16 and 18. A longitudinal slot 19 in the upper side of the annular shoulder 14 connects the two cylindrical chambers 16 and 18 of the cylinder 10.

A radially disposed cavity 20 is provided in the forepart of the cylinder 10 in communication with the larger cylindrical chamber 18. A coil spring 21 in the cavity 20 yieldably urges a ball 22 downwardly and into the larger cylindrical chamber 18 of the cylinder 10 for reasons which will appear later. A barrel assembly, in the larger cylindrical chamber 13, comprises a sleeve 24 detachably connected to the tubular end 23 on a hollow op erator handle 25 by screws 26. An annular array of indentations 27 are provided on the outer periphery of the tubular end 23, as shown in FIGURES 3 and 7, for seating the spring loaded ball 22.

A pair of longitudinal projections 29 are formed on the inner surface of the tubular end 23 on the operator handle 25. A plug 30 is movably retained in the operator handle 25 by a series of spaced diametrally disposed Wafers 32. A coil spring 33, is associated with each of the wafers 32, yieldably holding it in the full line posi tions shown in FIGURES 3 and 5. A rectangular opening 34 is provided through each of the wafers 32 for reception of a key not here shown. The sleeve 24 has therein a longitudinally and inwardly disposed spline 28, as shown in FIGURES 3 and 9.

Two diametrally disposed elongated slots 36 are placed on the periphery at the inner end of the plug 3%, as shown in FIGURES 3 and 6. An annular recess 38 and an axially aligned socket 39 are provided on the inner face of the plug 3%. A longitudinally disposed compression spring 46) is seated at the forward end in the annular recess 38. A connector 42 in the chamber 18 of the cylinder 10 has a central opening 44 therethrough, and a circular recess 46 in the forward end holdably seating the compression spring 40. Two longitudinal projections 48, on the front end of the connector 42 are slidably retained in the elongated slots 36 on the plug 30.

A pair of diametrally disposed slots 50 are provided on the outer surface of the connector 42, as shown in I FIGURES 3 and 8, for reception of the projections 29 on the tubular end 23 of the operator handle 25. A central socket 52 is provided in the rear end of the connector 42, and a radially disposed set screw 54 is threaded into the connector so as to extend into the socket 52. An operator 56, with an axial opening 58 therethrough, has a hub 59 detachably secured in the socket 52 by means of a set screw 54. A rectangular extension 60 on the rear of operator 56 is detachably secured in an actuator cam 61 for shifting the bolt of a conventional cylinder type lock not here shown.

A radially disposed elongated slot 62 is placed in the rear portion of the operator 56, and an annular groove 64-, as shown in FIGURES 3 and 14, is provided on the outer periphery thereof adjacent the hub 59. A cavity 66 in the upper side of the operator 56, has therein a transversely slidable locking dog 68. A lateral seat 763 on the locking dog 68 supports a coil spring 7a held in a compressed condition by a circular shaped retainer clip 74 engaged in the annular groove 64-. An elongated tie rod 76 of rectangular cross section extends through the central openings in the operator 56 and connector 42, and

is secured in the socket 39 of the plug by means of a transverse drive pin 78.

An upstanding control tab 80, on the terminus of the tie rod 76, is slidably located in the radial slot 62 of the operator 56. A longitudinally disposed slot 82 is provided in the upper surface of the hub 59. A drive wheel 84, rotatably mounted on the hub 59, has a pair of spaced fingers 86 in slidable engagement with the spline 28 on the sleeve 24. A tit 87 is provided on the rear face of the drive wheel 84, as shown in FIGURES 3 and 9. A series of circular tumblers 88 are rotatably mounted on the hub 59 of the operator 56. A tapered notch 90, in the outer periphery of each tumbler 88, as shown in FIGURE 13, is dimensioned to receive the locking dog 68.

Engagement tits 92 and 94 are placed on the front and rear faces respectively of each tumbler 88. A positive stop 96 is placed on the operator 56 for contact with the engagement tit 94 on the back face of the rear tumbler 88. A spacer washer 98, having a locking tab 196 located in the slot 82 of the hub 59, is placed on each side of the tumblers 88 and the drive wheel 84. A coil spring 192 on the hub 59 provides the desired frictional engagement between the tumblers 88 and the drive wheel 84.

The preceding discussion completes a description of the structural details of the applicants invention as herein disclosed; however, to insure a more thorough appreciation and understanding of the subject matter herein presented, a brief discussion will be directed to the manner in which the applicants lock operates in performing its intended function, and making possible the realization of the objcctives previously herein set forth.

In use, when it is desired to operate the applicants lock with :3, key, the later is inserted into the rectangular openings 34 in the wafers '32 thereby elevating them to the broken line position 110 shown in FIGURE 5. The

plug 30 can then be advanced or pushed inwardly thereby compressing the spring and moving the tie rod 76 rearwardly. The control tab 80 on the tie rod 76 is thus shifted from the slot 19 in the annular shoulder 14 into the cylindrical chamber 16. Rotation of the key will then cause the operator 56 to pivot, thereby turning the cam 61 so as to shift the bolt of any conventional cylinder lock not here shown.

When it is desired to remove the key, it is rotated so :as to return the plug 39 to its initial position in the operator handle 25, thereby aligning the control tab 80 with the slot 19 in the annular shoulder 14. The coil spring 40 then returns the plug 30 to its forward position in the handle 25, which moves the control tab 80 into the slot 19. The key may then be withdrawn from the plug 30 thus allowing the wafers 32 to return to the full line or locked position shown in FIGURES 3 and 5.

When it is desired to operate the lock by use of the combination, the handle 25 is turned in a counter-clockwise direction thereby causing the spline 28 on the sleeve 24 to rotate the drive wheel 84. The tilt 87 on the rear face of the drive wheel 84 is thus brought into turning engagement with the tit 92 on the front face of the forward tumbler 88. The tits 92 and 9-4 on the successive tumblers 88 are similarly brought into turning engagement with each other thereby rotating the tumblers 88 until the tit 94 on the rear face of the back tumbler makes contact with the positive stop 96 on the operator 56.

The operator handle 25 is then turned in a clockwise direction a definite number of clicks, as dictated by the specified combination for the lock, such clicks being produced by the spring loaded ball 22 registering with the indentations 27 on the tubular end 23 of the operator handle 25. The clockwise movement of the operator handle 25 a pre-selected distance, turns the drive wheel 84 and tumblers 88 so that the tapered notch 90 in the rear tumbler 88 is disposed directly below the locking dog 68. Rotation of the operator handle 25 is again reversed, and it is turned a pre-selected distance dictated by the second number in the combination for the lock, thereby aligning the notch 90 in the second tumbler below the locking dog 68.

This reversal of rotation for the operator handle 25 is continued until all the numbers in the combination have been turned. All the tumblers 88 will then have been oriented so that the notches 90 are all disposed below the locking dog 68. The coil spring 72 thereupon moves the locking dog 68 downward into the tapered notches 90 thus leaving the barrel free to move outwardly in the cylinder 10. Rotation of the operator handle 25 is again reversed turned until the projections 29 on the tubular end 23 of the operator handle 25 are longitudinally aligned with the elongated slots 50. The coil spring 40 then automatically moves the barrel assembly outwardly in the cylinder 10 to the broken line position 112 shown in FIGURE 3.

This outward movement of the barrel shifts the tie rod 76 so that the control tab moves forward from the slot 19 and into the cylindrical chamber 18. Further rotation of the operator handle 25 is then transmitted through the sleeve 24 and the connector 42 to the plug 30. This turning movement of the plug 30 rotates the operator 56 through the tie rod 76, thereby pivoting the cam 61 so as to shift the sliding bolt of a lock not here shown. To re-set the lock after it has been opened by use of the combination, the operator handle 25 is turned in either direction simultaneously with the application of an inward force of sufiicient magnitude to overcome the outward push of the spring 40.

Thus when the control tab 80 is longitudinally aligned with the slot 19 in the annular shoulder 14 of the cylinder 10, it moves backward into the slot 19. Further turning effort exerted on the operator handle 25 then forces the locking dog 68 upward from the tapered notches in the tumblers 88 leaving them free to turn. Continued rotation of the operator handle 25 thus disarranges the tumblers 88 so that they hold the locking dog 68 in an elevated position until the proper combination is again turned on the operator handle 25.

Based upon the foregoing discussion, the applicant is of the opinion that his invention has fulfilled a long-felt need in the field of locks, and that he has accordingly made a valuable contribution to the related art. However while the invention was described with reference to the structural details of a single embodiment, it will be appreciated by those familiar with the art, that the principles involved are susceptible of numerous other practical adaptations.

Therefore, I claim as new and desire to secure by Letters Patent:

1. In a cylinder lock having an actuator cam for shifting a sliding bolt, a movable barrel in the cylinder, projections on the inner surface of the barrel, a plug in the barrel, a rotatable operator in the barrel connected to the actuator cam, a connector between the operator and the plug having slots therein for reception of the projections on the barrel, resilient means urging the barrel to a forward position in the cylinder, a rotatable tie rod connected to the plug slidably retained in the operator, a control tab on the tie rod having a front and a rear position in the cylinder, means in the cylinder preventing rotation of the tie rod when the control tab is in the rear position, rotatable tumblers on the operator each having therein a peripheral slot, a driver for the tumblers controlled by the barrel, a locking dog slidably mounted in the operator, resilient me ans holding the locking dog in contact with the rotatable tumblers, and means for indicating rotary movement of the barrel so that the same may be turned in accordance with a pre-seiected combination to orient the tumblers and align the slots therein to receive the locking dog, whereupon the barrel then moves forward engaging the projections thereon in the slots of the connector and moving the control tab to the front position so that further rotation of the barrel will be transmitted through the tie rod and operator to the actuator cam and shift the sliding bolt of the cylinder lock.

2. In a cylinder lock having an actuator cam for shitting a sliding bolt, a movable barrel in the cylinder, projections on the inner surface of the barrel, a plug in the barrel, a rotatable operator in the barrel connected to the actuator cam, a connector between the operator and the plug having slots therein for reception of the projections on the barrel, resilient means between the connector and the plug yieldably urging the barrel to a forward position in the cylinder, a rotatable tie rod connected to the plug slidably retained in the operator, a control tab on the tie rod having a front and a rear position in the cylinder, means in the cylinder preventing rotation of the tie rod when the control tab is in the rear position, rotatable tumblers on the operator each having therein a peripheral slot, a driver for the tumbler, means on the barrel engaging the driver, a locking dog slidably mounted in the operator, resilient means holding the locking dog in sliding contact with the periphery of the rotatabletumblers, and means for indicating rotary movement of the barrel so that the same may be turned in accordance with a pre selected combination to orient the tumblers and align the slots therein to receive the locking dog, whereupon the barrel then moves forward engaging the projections thereon in the slots of the connector and moving the control tab to the front position so that further rotation of the barrel will be transmitted through the tie rod and operain the cylinder preventing rotation of the tie rod when the control tab is in the intermediate position, rotatable tumblers on the operator each having therein a peripheral slot, a driver for the tumblers controlled by the barrel, a locking dog slidably mounted in the operator, resilient means holding the locking dog in contact with the rotatable tumblers, and means for indicating rotary movement of the barrel, so that the same may be turned in accordance with a preselected combination to orient the tumblers and align the slots therein to receive the locking dog, whereupon the barrel then moves forward engaging the projections thereon in the slots of the connector and moving the control tab to the front position so that further tor to the actuator cam and shift the sliding bolt of the cylinder lock.

3. In a cylinder lock having an actuator cam for shift ing a sliding bolt, a movable barrel in the cylinder, projections on the inner surface of the barrel, a plug movably mounted in the barrel, key actuated means controlling movement of the plug, a rotatable operator in the barrel connected to the actuator cam, a connector between the operator and the plug having slots therein for reception of the projections on the barrel, resilient means urging the barrel to a forward position in the cylinder, a rotatable tie rod connected to the plug slidably retained in the operator, a control tab on the tie rod having a front, an intermediate and a rear position in the cylinder, means rotation of the barrel will be transmitted through the tie rod and operator to the actuator cam and shift the sliding bolt of the cylinder lock.

4. In a cylinder lock having an actuator cam for shifting a sliding bolt, a movable barrel in the cylinder, projections on the inner surface of the barrel, a plug movably mounted in the barrel, a rotatable operator in the barrel connected to the actuator earn, a connector between the operator and the plug having slots therein for reception of the projections on the barrel, resilient means urging the barrel to a forward position in the cylinder, a rotatable tie rod connected to the plug slidably retained in the operator, a control tab on the tie rod having a front, an intermediate and a rear position in the cylinder, means in the cylinder preventing rotation of the tie rod when the control tab is in the intermediate position, rotatable tumblers on the operator each having therein a peripheral slot, a driver for the tumblers controlled by the barrel, a locking dog slidably mounted in the operator, resilient means holding the locking dog in contact with the rotatable tumblers, means for indicating rotary movement of the barrel, and key actuated means controlling movement of the plug in the barrel, so that upon the insertion of a preselected key in the plug, the latter may be pushed inwardly thereby moving the control tab to its rear position in the cylinder whereupon the key may be rotated to impart a turning movement through the plug and tie rod to the operator which pivots the actuator cam and shifts the sliding bolt of the cylinder lock.

References Cited by the Examiner UNITED STATES PATENTS 2,013,055 9/1935 Kerwin -221 2,111,511 3/1938 Lowe et al. 70-22l 2,481,099 9/1949 Forrno et al. 70--285 2,705,885 4/1955 Craig 70-285 X FOREIGN PATENTS 25,405 10/1930 Great Britain.

BOBBY R. GAY, Primary Examiner. 

1. IN A CYLINDER LOCK HAVING AN ACTUATOR CAM FOR SHIFTING A SLIDING BOLT, A MOVABLE BARREL IN THE CYLINDER, PROJECTIONS ON THE INNER SURFACE OF THE BARREL, A PLUG IN THE BARREL, A ROTATABLE OPERATOR IN THE BARREL CONNECTED TO THE ACTUATOR CAM, A CONNECTOR BETWEEN THE OPERATOR AND THE PLUG HAVING SLOTS THEREIN FOR RECEPTION OF THE PROJECTIONS ON THE BARREL, RESILIENT MEANS URGING THE BARREL TO A FORWARD POSITION IN THE CYLINDER, A ROTATABLE TIE ROD CONNECTED TO THE PLUG SLIDABLY RETAINED IN THE OPERATOR, A CONTROL TAB ON THE TIE ROD HAVING A FRONT AND A REAR POSITION IN THE CYLINDER, MEANS IN THE CYLINDER PREVENTING ROTATION OF THE TIE ROD WHEN THE CONTROL TAB IS IN THE REAR POSITION, ROTATABLE TUMBLERS ON THE OPERATOR EACH HAVING THEREIN A PERIPHERAL SLOT, A DRIVER FOR THE TUMBLERS CONTROLLED BY THE BARREL, A LOCKING DOG SLIDABLY MOUNTED IN THE OPERATOR, RESILIENT MEANS HOLDING THE LOCKING DOG IN CONTACT WITH THE ROTATABLE TUMBLERS, AND MEANS FOR INDICATING ROTARY MOVEMENT OF THE BARREL SO THAT THE SAME 